package com.lht.testDemo.dozerMapper;

/**
 * @author Eric
 * @version 1.0
 * @date 2019-07-31
 */


import com.github.dozermapper.core.DozerBeanMapper;
import com.github.dozermapper.core.DozerBeanMapperBuilder;
import com.github.dozermapper.core.Mapper;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

/**
 * 简单封装Dozer, 实现深度转换Bean<->Bean的Mapper.实现:
 *
 * 1. 持有Mapper的单例. 2. 返回值类型转换. 3. 批量转换Collection中的所有对象. 4.
 * 区分创建新的B对象与将对象A值复制到已存在的B对象两种函数.
 *
 * @author calvin
 */
public class BeanMapper {

    /**
     * 持有Dozer单例, 避免重复创建DozerMapper消耗资源.
     */
    private static Mapper dozer = DozerBeanMapperBuilder.create()
            .withMappingFiles("dozer.xml")
            .build();


    /**
     * 基于Dozer转换对象的类型.
     */
    public static <T> T map(Object source, Class<T> destinationClass) {
        return dozer.map(source, destinationClass);
    }

    /**
     * 基于Dozer转换Collection中对象的类型.
     */
    public static <T> List<T> mapList(
            @SuppressWarnings("rawtypes") Collection sourceList,
            Class<T> destinationClass) {
        List<T> destinationList = new ArrayList<T>();
        for (Object sourceObject : sourceList) {
            T destinationObject = dozer.map(sourceObject, destinationClass);
            destinationList.add(destinationObject);
        }
        return destinationList;
    }

}
